Does it feel like static electricity? There are three types of electricity we could be dealing with here - static DC, DC from the laptop and AC from the laptop. I'm assuming you've experienced a shock from both static and AC, and they feel different. AC is a jolting jarring shock, while DC is more of a sharp steady painful shock. Static electricity is DC, but it hits you with one quick DC zap and then it's gone. This is because static builds up over time and then sits there waiting for some way to dissipate. Once you dissipate it, it's gone until it has a chance to build up again. So if it zaps you once and then it's gone until you put the laptop away and walk around and stuff, it's just static electricity and there's nothing wrong with your laptop. But if it keeps shocking you even though you haven't gone anywhere, then there's something wrong with the laptop and you need to get it checked out.
This is going to sound like a stupid question, but do you have gas heat?
Speaking from my own experiences in the same geographical area as you (Knoxville and Nashville), every place I've lived in that had gas heat has given me problems with static electricity during cold weather. This is because gas heat dries out the air and static builds up easier in lower humidity. My laptop tends to zap me the first time I touch a metal part whenever it gets cold out. It doesn't do this when it's warm.